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How Restaurant Pagers Work

electronics.howstuffworks.com/everyday-tech/restaurant-pager.htm

You've probably used a restaurant pager, but have you taken one apart? We have -- see how a restaurant pager works.

Have you seen investigators on crime shows who spray some stuff on a "clean" carpet and suddenly -- blood stains! Well, of all the fictional technology on TV, it turns out this stuff is real! Find out how luminol reveals the blood.

What Makes Glass Transparent?

science.howstuffworks.com/question404.htm

What makes glass transparent? Learn how liquid and gas molecules determine whether you can see straight through things.

How Mars Odyssey Works

science.howstuffworks.com/mars-odyssey.htm

Mars Odyssey is NASA's latest Mars spacecraft, and it's going to the red planet in search of water. Learn how this orbiter could pave the way for manned missions to Mars!

Classic Toys & Games

entertainment.howstuffworks.com/toy-pictures.htm

The toy picture gallery has photos of the most popular toys of all time. Check out the pictures of dolls, action figures, and building blocks.

What's the difference between stalactites and stalagmites?

science.howstuffworks.com/environmental/earth/geology/stalactite-stalagmite.htm

Stalactites and stalagmites are two common cave features that are often mistaken for each other. Learn about stalactites and stalagmites.

What makes evidence inadmissible in court?

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What makes evidence inadmissible in court is determined by the Federal Rules of Evidence. Learn exactly what makes evidence inadmissible in court here.